Features: Five models from 500 VA to 4,000 VA, Single Phase AC, DC, AC+DC output modes DC or 15 Hz to 1 kHz Delivers full power with up to 6:1 Crest Factor loads Analog signal input, functions as a high-power amplifier Programmable voltage, current limit, frequency Turn on, turn off phase angle control Powerful measurement of Vrms, Irms, Ipk, power, inrush current, frequency, crest factor, power factor, VA, and more Input power factor correction Combine 3 units for 3-phase power output GPIB, RS-232C, Analog Programming Interface Board and Rack Kit included The 61602 is an ac source from Chroma.